123405 Apr 2026

1×2×3×4×5=1201 cross 2 cross 3 cross 4 cross 5 equals 120

def checkio(number): result = 1 # Convert number to string to iterate over digits for digit in str(number): if digit != '0': result *= int(digit) return result print(checkio(123405)) # Output: 120 Use code with caution. Copied to clipboard 2. Why Skip the Zeros? 123405

Challenges like aren't just about math; they are about data integrity . Whether you are cleaning a database or writing a game engine, knowing how to filter out "noise" (like those zeros) while keeping the "signal" (the other digits) is what makes a great developer. 1×2×3×4×5=1201 cross 2 cross 3 cross 4 cross

The number is often used in coding challenges (like those on CheckiO) to teach basic algorithm logic, specifically how to calculate the product of digits while skipping zeros . Challenges like aren't just about math; they are

Want to see more algorithm breakdowns? Check out Algorithm blog post #3 on Medium for similar challenges!

Here is a blog post tailored for a developer or student audience focusing on this specific challenge.

The "Skip the Zero" Challenge: Mastering Digit Products in Python